Tryton module to move storage locations

The stock location move module allows to define some Locations as movable (like palette). Such locations can be moved using an Internal Shipment. The parent location is changed for the destination location when the shipment is done. If there is a transit location, the locations will be first moved to this one when shipped. A reservation mechanism prevent to assign the same locations at the same time. If a Customer Shipment or a Supplier Return Shipment empties a movable location, it will automatically deactivate it.